Lactococcus lactis ssp lactis



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tarix17.01.2018
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Lactococcus lactis ssp. lactis


  • Lactococcus lactis is a lactic acid bacteria (LAB),one of a group of microorganisms whose basic function is to convert carbohydrates into lactic acid.

          • L. lactis ssp. lactis is one of L. lactis’s two subspecies, and was formerly designated Streptococcus lactis.
  • In nature, L. lactis is found on plant surfaces, animal skin and hair and in the gastrointestinal tracts of animals. It is inactive on the plant but begins to multiply once it reaches an animal’s gastrointestinal tract.



For other purposes, L. lactis is a key component in the dairy industry as a starter in cheese fermentation. It is also used to prepare beer, wine, and pickled vegetables.

  • For other purposes, L. lactis is a key component in the dairy industry as a starter in cheese fermentation. It is also used to prepare beer, wine, and pickled vegetables.

  • L. lactis ssp. lactis is the preferred starter for soft cheeses.

  • It is estimated 10 million tons of cheese are made each year and people consume more than 10^18 of these bacteria.



  • L. lactis subsp. lactis was completely sequenced by Sep.19, 2001 by the Microbial Genetics group at the Institut National de la Recherche Agronomique (INRA) in Jouy en Josas, France and Genoscope, the French National Sequencing Center in Evry, France.



  • Since LAB are comprised of both helpful bacteria, like L. lactis, and pathogenic bacteria, like Streptococcus pneumoniae, having the genome sequenced for at least one LAB is useful.





L. lactis has 2,310 predicted genes with 64.2% having known roles in cell function, 20.1% matching other hypothetical genes, and 15.7% being unique to this bacterium.

  • L. lactis has 2,310 predicted genes with 64.2% having known roles in cell function, 20.1% matching other hypothetical genes, and 15.7% being unique to this bacterium.

  • L. lactis has 2,365,589 base pairs and makes up one chromosome.

  • L. lactis has a G+C content of 35.4%.



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